When some of them are saying that going away from Snyder's vision resulted in a bad movie, it's not surprising there is pushback against them. The fans at least, since Snyder is not pushing for that narrative and seems supportive of Jenkins from what I've seen.
For the record, I think this movie not landing in several aspects is down to Jenkins and deserves criticism. But there is definitely an extreme segment of the fandom that are pouncing on this and trying to hold it up as a sign that Snyder should be back in charge. But they are probably a vocal minority.